baber/WOPTO huggingface dataset:
Patent TW-202305109-A (TW)
Title: Methods of perfusion culturing a mammalian cell
Inventor: BARRETT SHAWN L
IPC: C12N5/00
Filed: 2022-04-14
Abstract: Provided herein are methods of perfusion culturing a mammalian cell that include: providing a vessel containing a mammalian cell disposed in a first liquid culture medium having an osmolality of about 270 mOsm/kg to about 380 mOsm/kg; incubating the mammalian cell for a period of time at about 32 °C to about 39 °C; and during the period of time, continuously or periodically removing a first volume of the first liquid culture medium and adding to the first liquid culture medium a second volume of a second liquid culture medium, wherein the first and second volumes are about equal and the osmolality of the first and second liquid culture medium in the vessel is maintained at about 270 mOsm/kg to about 380 mOsm/kg over the period of time.
Patent TW-202301151-A (TW)
Inventor: LICHTENAU CEDRIC
IPC: G06F17/15
Filed: 2022-04-19
Abstract: 獲得待執行之一函式的一指示，其中該函式為一指令之一個函式且經組態以執行多重操作。判定待執行之該多重操作中之一操作，且使用一組值及對應的一組關係來驗證一組函式特定參數。該組值及對應的該組關係係基於待執行之該操作。一組值及對應的一組關係待用於待執行之該操作，且另一組值及對應的另一組關係待用於該多重操作中之另一操作。
Patent TW-202300855-A (TW)
Title: Cartridge for air gun and air gun using the cartridge
Inventor: IWASAWA TAKAHIRO
IPC: F41B11/54
Filed: 2022-06-01
Abstract: Provided is a cartridge for an air gun capable of disposing the holding position of a bullet that is a BB bullet in the cartridge at a predetermined position. Also provided is an air gun in which a magazine does not move forward even in the event of cartridge pressing. A cartridge includes: a tubular cartridge main body portion; and a tubular cart inner disposed to be movable in a front-rear direction to press a bullet in the tubular cartridge main body portion. When the bullet is disposed in front of the cart inner, the bullet is pushed out forward by pressing the cart inner forward.
Patent TW-202315959-A (TW)
Title: Modular sputtering target with precious metal insert and skirt
Inventor: FISHER MATTHEW
IPC: C23C14/34
Filed: 2022-06-24
Abstract: A sputtering target including a target insert including a target metal compound and a skirt structure including a primary skirt and a secondary skirt. The primary skirt is disposed adjacent least a portion of a secondary skirt and includes a first metal compound. The secondary skirt includes a second metal compound that is different from the first metal compound.
Patent TW-202311479-A (TW)
Title: Optical adhesive layer and optical film with optical adhesive layer
Inventor: ARAI RYOSUKE
IPC: C09J7/20
Filed: 2022-06-30
Abstract: The invention provides an optical adhesive layer suitable for flexible device applications and an optical film with the optical adhesive layer. This optical adhesive layer (10A) is provided with a high adhesive layer (11) and a low adhesive layer (12). The low adhesive layer (12) has a first surface (12a) and a second surface (12b) on the opposite side from the first surface (12a). The high pressure-sensitive adhesive layer (11) is disposed on the first surface (12a) and has a high pressure-sensitive adhesive surface (11a) on the opposite side from the low pressure-sensitive adhesive layer (12). The highly adhesive surface (11a) has a peel adhesive force of 5 N/25 mm or more to the polyimide film under predetermined conditions after 30 minutes elapsed at 23 DEG C from the adhesion to the polyimide film. The ratio of the shear storage modulus of the low adhesive layer (12) at-20 DEG C to the shear storage modulus of the high adhesive layer (11) at-20 DEG C is less than 1.
Patent TW-202314382-A (TW)
Title: Actinic ray-sensitive or radiation-sensitive resin composition, method for producing actinic ray-sensitive or radiation-sensitive resin composition, actinic ray-sensitive or radiation-sensitive film, pattern forming method, method for manufacturing electronic device, resin, and method for producing resin
Inventor: YOSHIMURA TSUTOMU
IPC: G03F7/004
Filed: 2022-07-19
Abstract: Provided are: an actinic ray-sensitive or radiation-sensitive resin composition containing a resin having a pentafluorosulfanyl group and a solvent; a method for producing said composition; an actinic ray-sensitive or radiation-sensitive film using said composition; a pattern forming method; and a method for manufacturing an electronic device. Moreover, provided are: an actinic ray-sensitive or radiation-sensitive resin composition having few defects and excellent LWR performance due to a resin having a pentafluorosulfanyl group; a method for producing said composition; an actinic ray-sensitive or radiation-sensitive film using said composition; a pattern forming method; a method for manufacturing an electronic device; and a resin that can be used in said composition.
Patent TW-202332835-A (TW)
Title: Shaft assembly
Inventor: VAN HOOF NILS
IPC: F04C27/02
Filed: 2022-07-29
Abstract: A shaft assembly comprising: a first shaft (130) having a first shaft end; a coupling element (200) fixedly attached to the first shaft end, the coupling element (200) being configured to fixedly attach to a second shaft end of a second shaft (112); and an electrically insulative element (204) coupled between the first shaft (130) and the coupling element (200) thereby to electrically isolate the first shaft (130) from the coupling element (200). The first shaft (130) comprises a flange (206) located at the first shaft end, and the coupling element (200) is attached to the flange (206). The shaft assembly further comprises one or more fasteners (212) positioned through the flange (206) from a first side of the flange (206) to a second side of the flange (206) opposite to the first side of the flange (206), the one or more fasteners (212) extending into the coupling element (200), the coupling element (200) being located at the second side of the flange (206).
Patent TW-202246549-A (TW)
Inventor: FENWICK DAVID
IPC: C23C14/54
Filed: 2017-05-02
Abstract: 一種包含具有保護性塗層之主體的物件。此保護性塗層是包含金屬氟氧化物的薄膜。此金屬氟氧化物具有M
         x O
         y F
         z 之實驗式，其中M是金屬，y具有值為0.1至1.9倍的x值，z具有值為0.1至3.9倍的x值。此保護性塗層具有1至30微米的厚度與小於0.1%之孔隙度。
Patent TW-202309353-A (TW)
Inventor: HEUWIESER WALTER
IPC: C30B15/22
Filed: 2022-08-05
Abstract: 由單晶矽生產磊晶塗布半導體晶圓的方法，包括：在坩堝中提供矽熔體；藉CZ法提拉矽單晶，氧和硼結合到單晶中，單晶中氧濃度為6.4×10
         17 至8.0×10
         17 原子／cm
         3 ，單晶電阻率為10至25 mΩcm，熔體未摻雜氮和碳；在提拉被熱遮蔽體包圍的矽單晶期間向熔體施加CUSP磁場；以使商v／G為0.13至0.20 mm
         2 ／℃ min的方式控制提拉速度v和單晶與熔體間之相界處的軸向溫度梯度G；以在熔體上方並圍繞單晶的環形加熱器加熱單晶；加工矽單晶以由具拋光側面的單晶矽生產基板晶圓；在基板晶圓拋光側面沉積矽磊晶層，磊晶層沉積是過程中基板晶圓被加熱到700℃以上的第一熱處理。
Patent TW-202300960-A (TW)
Title: Metal mirror based multispectral filter array
Inventor: OCKENFUSS GEORG J
IPC: G02B5/20
Filed: 2016-12-26
Abstract: A device may include a multispectral filter array disposed on the substrate. The multispectral filter array may include a first metal mirror disposed on the substrate. The multispectral filter may include a spacer disposed on the first metal mirror. The spacer may include a set of layers. The spacer may include a second metal mirror disposed on the spacer. The second metal mirror may be aligned with two or more sensor elements of a set of sensor elements.
Patent TW-202331285-A (TW)
Title: Magnetism detecting device
Inventor: OHMORI HIROYUKI
IPC: G01R33/09
Filed: 2022-09-13
Abstract: The present invention suppresses a degradation in detection accuracy. This magnetism detecting device comprises a magnetoresistive element (10) and a detecting unit (109) that detects an external magnetic field on the basis of a resistance value of the magnetoresistive element. The magnetoresistive element comprises a fixed layer (11) in which the magnetizing direction is fixed, a non-magnetic layer (12) disposed on the fixed layer, and a free layer (13) that is disposed on the non-magnetic layer and the magnetizing direction of which changes over time, the magnetic anisotropic axis of the free layer being parallel to the magnetizing direction of the fixed layer.
Patent TW-202314304-A (TW)
Title: 光迴路基板及使用該光迴路基板的光學零件安裝構造體
Inventor: NAKATOMI YOSHINORI
IPC: G02B6/12
Filed: 2022-09-13
Abstract: 本揭示之光迴路基板係具備配線基板及光波導。配線基板中，上表面的一部分為光學零件之安裝區域。光波導位於與配線基板上的光學零件之安裝區域鄰接的位置，且具有核、第一包層及第二包層。核具備第一部分及第二部分。第一包層位於夾住核之第一部分之上下表面的位置，第二包層位於夾住核之第二部分之上下表面的位置。第二部分之寬度大於第一部分之寬度，第二部分之厚度大於第一部分之厚度。第二包層之折射率大於第一包層之折射率。
Patent TW-202332624-A (TW)
Inventor: TOMITA KAZUSHI
IPC: B63H25/08
Filed: 2022-10-17
Abstract: The present invention provides a single shaft-twin rudder vessel with automatic docking function, wherein a vessel motion control unit 620 performs an in-situ turning-around steerage for equalizing a bow distance and stem distance measured by a quay wall separation distance measuring device so that the bow-and-stern direction of a vessel 501 is parallel to a target quay wall 700, and makes the vessel 501 approach to a berth of the target quay wall 700 in the abeam direction while maintaining this parallel state.
Patent TW-202324572-A (TW)
Title: Modulating thermal conductivity to control cooling of showerhead
Inventor: GOMM TROY
IPC: H01L21/67
Filed: 2022-10-27
Abstract: A cooling plate for a showerhead in a substrate processing system includes a first portion that defines a first path through the cooling plate. The first portion includes a first inlet configured to receive flow of a first fluid and a first outlet in fluid communication with the first inlet. The first path is in fluid communication with the first inlet and the first outlet. The cooling plate includes a second portion that defines a second path through the cooling plate. The second portion comprises a second inlet configured to receive flow of a second fluid and a second outlet in fluid communication with the second inlet, the second path is in fluid communication with the second inlet and the second outlet, and the second path is not in fluid communication with the first path, the first inlet, and the first outlet.
Patent TW-202315225-A (TW)
Inventor: HSU CHIEN-YU
IPC: H01R9/03
Filed: 2022-11-18
Abstract: 一種線纜連接器包括絕緣本體、複數線纜導電端子、複數線纜以及接地殼體。前述複數線纜導電端子包括排列成第一排的複數第一線纜導電端子以及排列成第二排的複數第二線纜導電端子。每一個前述第一線纜導電端子包括第一插接部以及第一安裝部，每一個前述第二線纜導電端子包括第二插接部以及第二安裝部，前述第一安裝部與前述第二安裝部齊平。前述接地殼體包括位於前述第一線纜導電端子以及前述第二線纜導電端子之間的隔離件，以提高訊號完整性。本發明還揭示了一種包括前述線纜連接器的連接器組件。
Patent TW-202330540-A (TW)
Inventor: YAJIMA KAZUHISA
IPC: C07D493/04
Filed: 2022-12-06
Abstract: An object of the present invention is to provide a crystal of isomannide-bis(trimellitate anhydride) that has high purity and suitable as a resin raw material. A solution of the present invention is to provide a crystal of isomannide-bis(trimellitate anhydride), in particular, crystal of isomannide-bis (trimellitate anhydride) having melting endothermic peaks in a specific range which are measured by differential scanning calorimetry or having specific peaks in a powder X-ray diffraction peak pattern by Cu-K[alpha] radiation.
Patent UA-46489-A (UA)
Inventor: BOIKO VALERII VOLODYMYROVYCH
Filed: 2001-07-25
Abstract: The method for preparing the vascular prosthesis comprises biological coating of its walls. The prosthesis is placed into the nutrient medium containing the culture of the endothelial cells and kept in the medium until the endothelial lining is formed.
Patent UA-50439-A (UA)
Inventor: Polyvoda Serhiy Mykolayovych
Filed: 2002-01-10
Abstract: 桔⁥敭桴摯映牯攠瑳浩瑡湩⁧桴⁥慭獳漠⁦桴⁥慶捳汵牡猠来敭瑮挠湯楳瑳⁳湩瘠獩慵楬楺杮琠敨猠来敭瑮戠楥杮攠瑳浩瑡摥椠⁮桴⁥汰湡⁥数灲湥楤畣慬⁲潴琠敨氠湯楧畴楤慮⁬硡獩漠⁦桴⁥敳浧湥⹴吠敨椠瑮牥慮⁬湡⁤硥整湲污搠慩敭整獲漠⁦桴⁥慶捳汵牡猠来敭瑮愠敲琠敨⁮敭獡牵摥愠⁳桴⁥楤瑳湡散⁳敢睴敥⁮桴⁥瑵潭瑳愠摮琠敨洠獯⁴牰硯浩污瀠楯瑮⁳景琠敨瘠獡畣慬⁲楲杮甠潰⁮桴⁥湡污獹獩漠⁦桴⁥浩条⁥敢湩⁧扯慴湩摥‮桔⁥慭獳椠⁳慣捬汵瑡摥漠⁮桴⁥慢楳⁳景琠敨敳搠瑡⹡਍਍਍
Patent UA-52158-A (UA)
Title: Screw compressor
Inventor: TARABRIN OLEKSANDR IVANOVYCH
Filed: 2002-03-01
Abstract: A screw compressor has two rotors, the driving and the driven ones, each of those has spiral teeth and rests on support and stopper roll bearings, installed in the body. At that, the rotors are made with connection between those, by means of two pinions with the same number of teeth, besides that, the rotors are made hollow, and the support pinions of the rotors are made as being magneto-static, and are formed by ferromagnetic insertions.
Patent UA-54160-A (UA)
Title: Method for treating schizophrenia patients resistant to neuroleptics
Inventor: RACHKAUSKAS HENNADII STASYSOVYCH
Filed: 2002-05-27
Abstract: The method for treating the schizophrenia patients resistant to the neuroleptics comprises employing the immunoactive preparations upon in vitro assessing the susceptibility to such preparations. The rosette-forming assay is employed for such the assessment. The most appropriate immunoactive preparation is then administered.
Patent UA-54216-A (UA)
Title: Plant for concentration of foodstuffs and biological preparations
Inventor: STARCHEVSKYI IHOR PETROVYCH
Filed: 2002-06-13
Abstract: Plant for concentration of foodstuffs and biological preparations contains an evaporator, heater of processable product, condenser of water vapor, vacuum pump, pump for processable product and connecting pipelines. Evaporator represents a capacity; its bottom part is a collector for concentrated product. Upper part is equipped with a drip pan. The pump for processable product is located on the pipeline between an outlet from evaporator and inlet of heater. The pipeline of supply of processable product from the heater into evaporator is equipped with throttle device. A condenser of heating-refrigerating machine is used as a heater of processable product, and evaporator of heating-refrigerating machine is used as water vapor condenser.
Patent UA-55217-A (UA)
Title: Technique for sigmocystoplasty
Inventor: LISOVYI VOLODYMYR MYKOLAIOVYCH
Filed: 2002-07-22
Abstract: The technique for sigmocystoplasty in the microcyst employing the segment of the ileum comprises the mobilization of the part of the ileum. The ileum is folded in half with folded part facing upwards and is dissected along the edge against the mesentery in the longitudinal direction. Then the cut ileum is sewed along the edge of the incision, first – the posterior wall and than – the anterior one. The free edge of the half-reservoir generated in such a way is sutured with the edges of the dissected urinary bladder. The isolated segment of the sigmoid colon is used. The isolated segment of the ileum is anastomized terminally lateral into the anterior row of the sutures of the isolated segment of the sigmoid colon. The ureteral stumps cut from the bladder are also sutured to the structure generated in such a way.
Patent UA-57645-A (UA)
Title: Filter for purification of liquids
Inventor: SOLODKYI OLEKSANDR DMYTROVYCH
Filed: 2002-08-02
Abstract: Filter for purification of liquids has executive body as a mesh cone, this is placed in the pipeline, and purification unit, as a system of scrapers. Scrapers are bended triangular plates, those are fixed at angle to the generatrixes of the mesh cone, and convexity is directed in the direction of the cone rotation, this is provided by means of the special turbine.
Patent UA-57326-A (UA)
Title: Technical filtering cloth
Inventor: BELIK VLADYSLAV ANATOLIIOVYCH
Filed: 2002-08-15
Abstract: In technical filtering cloth from synthetic threads and/or natural yarns the threads have different relative elongation on warp – small from 10 to 20 % or big from 30 to 50 %, and/or weft threads have relative elongation made by the carriage that forms on the cloth rectangular areas with different properties.
Patent DO-P2016000286-A (DO)
Title: Compuesto heterocíclico que contiene nitrógeno
Inventor: KAMATA MAKOTO
IPC: C07D209/46
Filed: 2016-10-20
Abstract: La presente invención proporciona un compuesto que tiene una actividad del receptor colinérgico muscarínico M1 del modulador alostérico positivo y útil como un agente para la profilaxis o el tratamiento de la enfermedad de Alzheimer, la esquizofrenia, el dolor, el trastorno del sueño, la demencia de la enfermedad de Parkinson o la demencia con cuerpos de Lewy, y similares. La presente invención se refiere a un compuesto representado por la fórmula (I) o una sal del mismo. en la que cada símbolo está de acuerdo con lo descripto en la memoria descriptiva, o una sal del mismo.
Patent DO-P2017000101-A (DO)
Title: Formas cristalinas de 5-cloro-n4-[2-(dimetilfosforil)fenil]-n2-{2-metoxi-4-[4-(4-metilpiperazin-1-il)piperidin-1-il]pirimidina-2,4-diamina
Inventor: LEONARD W ROZAMUS
IPC: C07D239/48
Filed: 2017-04-20
Abstract: En la presente se describen nuevas formas cristalinas de brigatinib, composiciones farmacéuticas que las comprenden y métodos para su preparación y uso.
Patent DO-P2017000149-A (DO)
Title: Compuestos de triazolopirimidina y usos de los mismos
Inventor: QIONG ZHANG
IPC: C07D487/04
Filed: 2017-06-21
Abstract: Se proporciona un compuesto de la Fórmula (I), o una sal farmacéuticamente aceptable del mismo, el cual se ha mostrado es útil para tratar una enfermedad o trastorno mediado por PRC2 : en donde R1, R2, R3, R4, R5, y n son como se definen en la presente.
Patent EC-SP10010541-A (EC)
Title: Preparacion de lenalidomida
Inventor: DEVARAKONDA SURYA NARAYANA
IPC: A61K31/40
Filed: 2010-10-11
Abstract: Se describen los procesos para la preparacion de lenalidomida practicamente pura. La solicitud tambien se relaciona con una forma amorfa enriquecida practicamente pura y pura de lenalidomida y las dispersiones solidas que contienen lenalidomida amorfa.
Patent EE-200100485-A (EE)
Inventor: BRYANT CLIFFORD M
IPC: C07C271/22
Filed: 2000-03-15
Abstract: The present invention relates to novel N-cyanomethyl amides which are cysteine protease inhibitors, the pharmaceutically acceptable salts and N-oxides thereof, their uses as therapeutic agents and the methods of their making.
Patent GB-189507915-A (GB)
Title: Improvements in or appertaining to Hoists.
Inventor: MULLAN WILLIAM
Filed: 1895-04-20
Granted: 1896-03-07
Abstract: 7915. Mullan, W. April 20. Ships' ashes, discharging.-Within a tube F is mounted a piston to which is attached a rope wound around a pulley within a steam-tight case F<1>. Upon the spindle of this pulley, and outside the casing F<1>, is mounted a second pulley upon which the lifting-rope K is wound and from which it passes as indicated down the ventilating-shaft to the bucket D. A steam pipe L<4> enters the tube F at the top and a water pipe L from the tank l at the bottom. The valves l<4>, L<3> for the water and steam supplies may be operated simultaneously. To lift the bucket, the upper end of the tube F is opened to supply and closed to exhaust, while the lower end is put in communication with the tank l. By stopping the latter communication, the weight is arrested and held suspended. The water tank l may, however, be dispensed with. The steam may be supplied intermittently by the constant rotation of a hollow plug with ports which register alternately with the steam inlet and outlet pipes.
Patent GB-189700344-A (GB)
Title: Improved Apparatus for "Staving" or Thickening the Ends of Tubes.
Inventor: WALLER THOMAS NAUNTON
Filed: 1897-01-05
Granted: 1897-11-06
Abstract: 344. Waller, T. N. Jan. 5. Forging. - Relates to means for thickening or upsetting the ends of tubes. The tube y' is heated at one end and placed with its cool end clamped to an abutment, while its hot end rests in a support c and is enclosed by a hinged cap or cover d. The support c is capable of sliding on a bed. A mandrel a actuated by hydraulic or other means carries a sliding sleeve b, and its forward end is slightly tapered in order to enter the tube. The mandrel has a recessed shoulder v, and the support c, cover d, and sleeve bare slightly chamfered at w and x. In operation, the mandrel moves forward, carrying the sleeve (the latter moving somewhat faster than the mandrel towards the end of the stroke), and when the sleeve abuts against the support c, the latter is moved backwards slightly, and the end of the tube is set up. In order to give the requisite motion to the sleeve, the latter is connected by links k to arms l secured to the mandrel. The lower ends of the rods k are attached to a pin n which rolls in slots in counterweighted levers p, and is pulled forward by a weight o. The mandrel and sleeve being in their rearmost position, the two move forward together until the arms l encounter elevations on the levers p and depress them, thus forcing the pin n into recesses in brackets r. The levers k then turn about the pin n as a fixed pivot, and the sleeve b proceeds to move faster than the mandrel. In order to restore the support c to its original position for operation on a new tube, it is temporarily connected to the sleeve by a catch s, and thus moves back with the mandrel.
Patent GB-189704053-A (GB)
Title: Improvements in Fans for Advertising Purposes.
Inventor: REICHMANN JACQUES
Filed: 1897-02-15
Granted: 1897-03-20
Abstract: 4053. Reichmann, J. Feb. 15. Advertising.-Fans are painted &c. with a series of advertisement squares or spaces as in the Figure, the shield at the top part a being adapted to receive advertisements to which it is intended to draw special attention, and the space b between the columns c being adapted to receive a programme &c.
Patent GB-189704456-A (GB)
Title: Improvements in Means for Transmitting Power from one Shaft to another.
Inventor: ELIESON CHAIMSONOVITZ PROSPER
Filed: 1897-02-18
Granted: 1897-12-18
Abstract: 4456. Elieson, C. P. Feb. 18. Chain gearing.-Relates to gearing of the kind described in Specification No. 10,861, A.D. 1899 The block link chain, Fig. 3, engages in the ordinary way with the teeth of a small sprocket-wheel on the driving-shaft. The wheel f on the driven shaft is driven frictionally by means of pins d, projecting from the chain, which bed in strips g of leather &c. surrounding the rim at each side. In the modification shown in Figs. 6 and 7, the pins carry friction shoes h adapted to work with a plain wheel.
Patent GB-189705665-A (GB)
Title: Improvements in Machines for Shaping the Necks of Bottles, and Forming therein Cavities or Recesses or Marks.
Inventor: BOUNEU LOUIS
Filed: 1897-03-03
Granted: 1897-04-03
Abstract: 5665. Bouneu, L. March 3. Bottle necks, making.-Relates to improvements on the machine described in Specification No. 24,589, A.D. 1896. A coarse-pitched screw J, rotated by an internally-threaded cam S which is reciprocated by a hand-lever N, imparts rotary motion to an annular frame M carrying rollers K which shape the bottle neck, the rollers being moved towards or from each other by levers G, the ends of which bear upon the surface of the cam S. The frame M also carries a pair of diametrically-opposed dies, which can be brought to act on the shaped bottle neck by an arrangement of levers to indent or mark the same.
Patent GB-189707496-A (GB)
Title: Improvements in Velocipede Saddles.
Inventor: PERRY HARRY ALONZO
Filed: 1897-03-23
Granted: 1897-05-01
Abstract: 7496. Perry, H. A. March 23. Saddles, pneumatic. A plate A, covered with leather B below and felt or the like C above, forms a support for an inflated bag which is enclosed by a leather or other cover E stitched to the under leather B. The bag and plate A &c. have central elongated apertures e. The bag extends into the fore part of the saddle D and at the rear it is divided into two substantially oval portions D<1>
Patent GB-189708138-A (GB)
Inventor: WILLIAMS ALFRED EDWARD
Filed: 1897-03-30
Granted: 1897-06-12
Abstract: 8138. Williams, A. E. March 30. Tyres, pneumatic etc.; felloes or rims.-Round the wheel rim r is placed an endless inflatable tube a, which is encircled by one or more outer tubes b, c, each tube being separate or connected to the others by ducts d. The tubes are surrounded by a rubber and canvas or other cover e which has inwardly-projecting parts f for securing the tubes in position, and also suitably-shaped edges k for engaging with corresponding grooves i and projections h on the rim. The tubes may be equal, and the outer one may be replaced by a solid tyre.